Can anyone identify this fossil fish vertebral disc?

Shoreline discovery, lighthouse beach, Chatham, MA.

09 October 2018 1,260 0 View

Can anyone identify this Permian seed from Madagascar?

Probably from the Sakamena Formation; photos are opposite sides of the same seed; millimeter scale.

09 October 2017 4,094 3 View

What are the top three largest natural gas fields in the world?

Can you estimate the reserves of each?

08 September 2014 6,058 1 View

How might one recognize tornado occurrence in the rock record?

Would shredded plant material be an indication?

03 April 2014 490 18 View

Are any American scientists, a marine vertebrate paleontology and a marine sedimentologist, interested in co-supervising a Keck study?

Research venue: Triassic strata, Nevada. Date: Next summer.

06 July 2013 2,338 9 View

What is the oldest known fossil amphipod?

Why do amphipods in general have such a limited fossil record?

05 June 2013 9,883 7 View

Can Neo-Darwinism (ND) today be considered a valid scientific theory?

[Tip of the hat to Darryl Smith.]

04 May 2013 3,463 34 View

Do slime molds have a fossil record?

If so, can you provide the pertinent reference?

03 April 2013 1,714 2 View

What controls the placement of parr marks or lateral bars in Salmonidae juveniles (parrs)?

Is the retention of parr marks in adult Golden Trout (Salmo aguabonita) a case of neoteny?

01 January 1970 7,144 0 View

Is life as fundamental a property of the universe as matter and energy?

This was the contention of Vladimir Vernadsky; a viewpoint that really upset A. I. Oparin.

01 January 1970 6,128 1 View

Is this the fragment of a sauropod tooth?

Dear colleagues. Fragments of this species are very rare from a terrestrial Lower Cretaceous locality from Germany. Up to now from this locality sauropods could not be proved with certainty. Other...

14 February 2021 2,310 1 View

Does someone know which structure could exit the olfactory bulbs at their antero-dorsal top ?

Hi people, I am studying bat brains through endocranial casts and I cannot identify which structure could be present in sort of a canal located dorsally to the cribriform plate. It is like...

27 January 2021 797 6 View

What species (or genus even) of crab is this (bivalve using hermit type)?

Two weeks ago I found a peculiar crab in the intertidal zone in SW Florida. when found, the crab was not utilizing a shell. It was similar shaped to porcelain crabs found in our area, but with...

17 January 2021 1,620 4 View

Which is the most recent and updated classification of Class: Insecta?

Based on the many publications from several decades, we came across many classifications of Insects. Among them which one is more updated and approved classification that can be used for research,...

05 January 2021 3,668 9 View

How can we say a species of insects got extinct?

02 January 2021 4,232 10 View

No title

Despite the high CO2 of the Paleozoic atmosphere, when CO2 levels were greater than 4000 ppmv (parts per million by volume), scientific evidence indicates a period of glaciation around 445 million...

19 August 2020 6,452 3 View

Could anyone provide me any useful website or bibliography to learn about the principles of taxonomy in Biology and Paleontology?

I am an undergraduate and I would like to broaden my knowledge on this subject, beginning by its principles. Maybe it would help that purpose to broaden my knowledge on Phylogenetics as well....

08 June 2020 1,343 2 View

Is it better to use base e (LN) or base 10 (LOG10) when making estimates of body mass from linear measurements?

For linear regressions between linear measurements and body mass, which transformation is better to use? base e logarithm (LN)? or base 10 logaritm (LOG10). Apparently they do not make such a for...

08 April 2020 5,201 12 View

Can anyone tell me which species (or higher taxon) this is?

We found this small, maybe parasitic, crustacean in the North Sea offshore. The posterior body part is missing, but it looks quite characteristic. There is double-hooked rostrum, 2 antennae...

08 April 2020 6,842 9 View

How can I get individual rarefaction on PAST4 (Paleontological Statistics software)?

Hi, I'm currently working with PAST 4.01 and I have my data organized on a table of 4 columns (treatments) and 45 rows (different bacteria genders) with the amount of genders found in every...

31 March 2020 1,914 1 View